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hist030_TRatioPlot_residual.py
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## \file
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## \ingroup tutorial_hist
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## \notebook
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## Example of a fit residual plot.
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##
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## Creates a histogram filled with random numbers from a gaussian distribution
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## and fits it with a standard gaussian function. The result is passed to the `TRatioPlot`
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## constructor. Additionally, after calling `TRatioPlot::Draw` the upper and lower y axis
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## titles are modified.
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## Confidence interval bands are automatically drawn on the bottom (but can be disabled by draw option `nobands`).
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## Inspired by the tutorial of Paul Gessinger.
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## \macro_image
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## \macro_code
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##
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## \author Alberto Ferro
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import
ROOT
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ROOT.gStyle.SetOptStat
(0)
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c1 =
ROOT.TCanvas
(
"c1"
,
"fit residual simple"
)
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h1 =
ROOT.TH1D
(
"h1"
,
"h1"
, 50, -5, 5)
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h1.FillRandom
(
"gaus"
, 2000)
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h1.Fit
(
"gaus"
)
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h1.GetXaxis
().SetTitle(
"x"
)
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rp1 =
ROOT.TRatioPlot
(h1)
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rp1.Draw
()
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rp1.GetLowerRefYaxis
().SetTitle(
"ratio"
)
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rp1.GetUpperRefYaxis
().SetTitle(
"entries"
)
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c1.Update
()
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TRangeDynCast
ROOT::Detail::TRangeCast< T, true > TRangeDynCast
TRangeDynCast is an adapter class that allows the typed iteration through a TCollection.
Definition
TCollection.h:358
tutorials
hist
hist030_TRatioPlot_residual.py
ROOT master - Reference Guide Generated on Thu Feb 13 2025 15:59:18 (GVA Time) using Doxygen 1.10.0